1102111021 has 16 divisors (see below), whose sum is σ = 1225456128. Its totient is φ = 982810800.

The previous prime is 1102111007. The next prime is 1102111069. The reversal of 1102111021 is 1201112011.

It is a cyclic number.

It is not a de Polignac number, because 1102111021 - 2²⁷ = 967893293 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1102110989 and 1102111007.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1102111121) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 116686 + ... + 125776.

It is an arithmetic number, because the mean of its divisors is an integer number (76591008).

Almost surely, 2^1102111021 is an apocalyptic number.

1102111021 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

1102111021 is a deficient number, since it is larger than the sum of its proper divisors (123345107).

1102111021 is a wasteful number, since it uses less digits than its factorization.

1102111021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9312.

The product of its (nonzero) digits is 4, while the sum is 10.

The square root of 1102111021 is about 33198.0574883531. The cubic root of 1102111021 is about 1032.9400465069.

Adding to 1102111021 its reverse (1201112011), we get a palindrome (2303223032).

The spelling of 1102111021 in words is "one billion, one hundred two million, one hundred eleven thousand, twenty-one".